Charles Ellicott Commentary Isaiah 53:7

"He was oppressed, yet when he was afflicted he opened not his mouth; as a lamb that is led to the slaughter, and as a sheep that before its shearers is dumb, so he opened not his mouth." — Isaiah 53:7 (ASV)

He was afflicted ... —More accurately, He let himself be afflicted, as implying the voluntary acceptance of the suffering.

Opened not his mouth. —The silence of absolute acquiescence, as in Psalm 38:14; Psalms 39:9.

As a lamb to the slaughter. —It is suggestive, as bearing both on the question of authorship, and that of partial fulfilment, that Jeremiah (Jeremiah 11:19) appropriates the description to himself. In our Lord’s silence before the Sanhedrin and Pilate it is allowable to trace a conscious fulfilment of Isaiah’s words (Matthew 26:62; Matthew 27:14). (Compare to 1 Peter 2:23.)